Sources of moisture for different intensities of summer rainfall over the Chinese Loess Plateau during 1979–2009
Sources of moisture for different intensities of summer rainfall over the Chinese Loess Plateau during 1979–2009
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DOI：
10.1002/joc.5416
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
Q. Hu;D. Jiang;Xianmei Lang
中科院分区：
文献类型：
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作者：
Q. Hu;D. Jiang;Xianmei Lang
利用拉格朗日粒子扩散模式FLEXPART对1979-2009年黄土高原夏季（6 - 7 - 8月）不同强度降水的水汽来源进行了瞬态模拟。结果表明，中国西北-中亚东部和中国中东部是青藏高原夏季降水的主要水汽源地，其次是来自东海、南海、孟加拉湾和阿拉伯海的海洋水汽。随着降水强度的增加，中国西北部-中亚东部地区的水汽对CLP的贡献显著减少，而中国中东部地区的水汽对CLP的贡献略有增加。此外，海洋源区对CLP的贡献随着雨强的增加而增加。东海和孟加拉湾是0-5th百分位数（0-P5 th）到50 - 75 th百分位数的两个最重要的海洋水汽源区（P50-P75）降雨等级，而南海和孟加拉湾是75 - 95百分位数的两个最重要的海洋水汽源区（P75 th-P95 th）和第95 - 100百分位数（P95 th-P100 th）降雨等级。
In this study, moisture sources for different intensities of summer (June–July–August) rainfall over the Chinese Loess Plateau (CLP) were investigated by performing a transient simulation for the period 1979–2009 using the Lagrangian particle dispersion model FLEXPART. The results showed that continental areas surrounding the CLP, namely northwestern China–eastern central Asia and central eastern China, were major moisture source regions for summer rainfall over the CLP and that oceanic moisture originated from the East China Sea, the South China Sea, the Bay of Bengal, and the Arabian Sea played a secondary role. The moisture contribution of northwestern China–eastern central Asia to the CLP significantly decreased with increasing intensity of rainfall, whereas the contribution of central eastern China to the CLP slightly increased. Moreover, the moisture contribution of oceanic source regions to the CLP increased with the increased rainfall intensity. The East China Sea and the Bay of Bengal were the two most substantial oceanic moisture source regions for the 0–5th percentile (0–P5th) to 50th–75th percentile (P50th–P75th) rainfall classes, whereas the South China Sea and the Bay of Bengal were the two most substantial oceanic moisture source regions for the 75th–95th percentile (P75th–P95th) and the 95th–100th percentile (P95th–P100th) rainfall classes.